Overhead Suspension Presses
Johnson Progress offers a range of two styles of overhead filter presses, available in sizes from 915mm square to 2000mm square, suitable for filtration pressures up to 20 bar. These filter presses can be equipped with recessed chambers, flush plates and frames, and membrane filter plates. The two styles of overhead filter presses are:
Single Ram Closure
This style closes and tightens the filter press using a single ram, similar to a sidebar filter press. However, in the case of the overhead filter press, the plates are suspended from an overhead beam.
Multi Ram Closure
This style utilises multiple rams (usually 3 or 4) to pull the plate pack together rather than pushing it. This closure method is particularly advantageous for large machines with long pack lengths, as it prevents stresses from being imparted to the filter press framework.
Both styles of filter presses are equipped with their own hydraulic systems for closing and tightening. The control of these systems can be managed using either a PLC or conventional relay logic, depending on the requirements.
Typically, the single ram closure style ranges from 915mm square to 1500mm square and includes a double-acting hydraulic ram for opening and tightening. In contrast, the multi-ram closure style can be produced in sizes from 915mm square to 2000mm square, with options for either single or double-acting hydraulic rams.
Similar to the sidebar range, the overhead range of filter presses in both styles can be supplied with varying degrees of mechanisation, from manual operation to fully automated systems, along with a complete array of ancillary equipment.
The main advantages of overhead filter presses compared to sidebar models include better accessibility, no horizontal loads imposed on the foundation (in the case of the multi-ram closure style), and the design of the plate suspension and tracking assemblies. This design allows for filter plates, whether made of polypropylene or iron, to be easily moved by hand in sizes up to 1500mm square.
